<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport"
        content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>jQuery事件绑定</title>
  <style>
  </style>
</head>
<body>
  <button id="btn">点击</button>
  <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
  <script>
    const btn = $('#btn')
    btn.click(function () {
      console.log(1)
    })
    btn.click(function () {
      console.log(2)
    })
    btn.click(function () {
      console.log(3)
    })
  </script>
</body>
</html>